Screw-machine.



C. B. PICKUP.

SCREW MACHINE. APPLICATION FILED Nov. 24, 1913A www du a4 P www390@ 5 [1u/en tor.

f Wmesses G. B. P'IKP.

SCREW MACHINE.

APPLICATION FILED NOV. 24:1913 l l 1,1 10,570. Patented Sept( 15, 1914.

3 SHEETS-SHEET 2.

G. B.P-1GK0P. SCREW MACHINE.

APPLICATION FILED NOV. 24, 1913.

1,1 10,570, Patented Sept. 15, 1914.

3 SHEETS-SHEET 3.

6290. Piel/0 STATES PATENT OFFICE.

GEORGE B. .PICKOIES 0F HARTFORD, rCONNECTICUT, ASSIGNOR T0 THE NEW BRITAIN MACHINE COMPANY, NEW BRITAIN, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

'Among the objects of the invention are the: provision of means ofa simple and effective character by which rigidity in construction and accuracy and preciseness in` operationl are assured.

In the drawings accompanying and forming part of the present specification, I have shown in detail one of the several convenient forms of embodiment of the invention,

' which to enable those skilled in the art to practice the same will-be set forth fully inf the following description. I donot restrict` myself to this disclosure; I may depart therefrom in several respects within the sco e of the invention defined by the claims fol owingv said description.

Referring to said drawings:

In a machine involving my through the intervention-of suitable means, to transfer its effect to auxiliary cams. ByE

virtue of this organizationthe main or master cam can be actuated at a constantior uniform speed, whereas the effects of the Specification of Letters Patent.

Application led November 24, 1913. Serial No. 802,591.

Figure 1 is a side elevation partly in central vertical section, of the intermediate portion of a screw machine involving my invention. Fig. 2 1sl a ltransverse section on the line 2 2 of Fig.; 1, looking in the direction of the arrow. Figs. 3 and 4 are Sections on the line 3-3' of 1, flocking inthe direction of the arrow, certain of the parts shown in Fig.- 3 being omitted in Fig. 4. j

Like haracters refer to like parts through- `outthe several figures'.

is the 'block 11 surmounted in turn by the invention there.;l .are several carriers, and. although these ycarriers may be of any.desirablev form, I prefer forsimplicity, that 'they consist of slidesA adapted-to support suitable devices, for in-v stance tools whlch ray be of any convenient SCREW-MACHINE. i

Patented Sept. 15, 1914.

auxiliary cams can be totally different from each other. The foregoing is a brief description of oneof the novel features ofthe invention. These carriers or slides are sustained in a novel manner, upon a stationary support and are arranged in approximatel annular order about a series of rotary Werl; 4spindles supported by a rotary head. The rotary spindle-supporting head is mounted in a novel manner.

With the foregoing general observations I will now describe the illustrations in detail.

The diHerent parts of the machine can be sustained u on a suitable framework, that shown consisting ofthe bed or foundation member 2. The main or cam shaft is denoted by 3, and it is continuously rotated in any desirable manner, for instance by suitable gearing interposed between said shaft and one not shown, provided with a pulley to receive a belt or other driving means. At the right in Fi 1 a cam-drum 5 is shown fastened to the s aft 3. On the upper side of the bed are slideways which receive the slide 6 provided with a pendent stud. 7, adapted, to be operated by cam members or strips 8 and 9 on the drum 5 to reciprocate the slide 6 which may be equipped with a series of tools, only one of which is shown, however, and that one being a drill as 10.V

Mounted on the upper side of the bed 2 block or cap-piece 12, the two parts ing connected to each other and to said bed by bolts as 13, said artsll and l2 presenting a stationary hea or bearing for the rotary ,spindle'carrying head 14, the stationary vhead having an approximately cylindrical or circular chamber to receive the'. spindlecarrying head 14 for rotation. The lower or base block 1-1 is slotted'as at 15 for the passage of an indeXing-pawl as will hereinafter appear. The stationary head, made up as shown of the superimposed parts 11 and 12, i

constitutes not only a bearing for the rotary spindle-carrying head 14 .but also presents a convenient support for certain tool-carriers `as will hereinafter appear.

The ends of the rotary head or barrel 14 have openin s to receive the rotary shaft 16 which may e turned in any desirable `Inanner.y The work-spindles 17 in the4 organisation shown are simultaneously rotated said shaft which for such purpose has fas tened to it a spur-gear 18 meshing with pinions 19 rigid with the respective work-spindles 17 furnished with chucks or equivalents 20.

The stationary head consisting as already described, of the superimposed blocks 11 and 12, is provided at its forward side with yseveral integral radial projections 21 furnished Iwith parallel forwa1'dlyextending walls 22, the inner faces of which are undercut as at 23 to provide ways for the slides 24, the rear faces of which latter engage against the bodies of the said projections 21. The inner faces of the respective walls 22 forward of the undercut portions 23 are straight and in parallelism with each other as at toprovide guideways for certain devices hereinafter described. Each slide 24 is equipped with forwardly-extending, parallel walls 26 which slide in contact with and between the parallel faces 25 to which I have just alluded. Bridging the outer sides of the walls 26 are the cross bars 27, held in place by screws 28 tapped into the respective walls 26. Through each cross piece in turn is tapped a screw 29 adapted to engage against the outer end of a tool 30. Crossing the side walls 26 at the front are the bridge members 31, which have open ended slots 32 to fit over threaded studs 33 extending outwardly from the respective side walls 26, thethreaded studs or screws 33 receiving the holding-nuts 34 which engage against the outer faces of the bridge members 31 to clam the same in place. Through the bridge-pieces are .tapped bind- 'ing-screws -35 which engage the forward sides of the respective tools to hold the same firmly against the wedge members 36 cooperative with the wedge members 37, the inner wedge members 36 being relatively or normally stationary and having on their sides fins or ribs 38 to engage grooves or' channels in the flat faces 25. The upper wedge members 37 are provided with lugs 39 to receive screws 40 tapped into the respective slides 24. It will be clear that the beveled surfaces of the respective wedge members 36 and 37 engage each other and that through the adjustment of the several screws 40 the Wedge members 37 can be adjusted with respect to the wedge members 36 to laterally position as required, the several tools 30.

Tapped into the respective tool slides 24 are screws' 41 constitutin suitable studs or projections, which exten rearwardly from the respective slides and through radially elongated slots 42 in the bearings or projections 21, so that they can be operated` by suitable means as will hereinafter appear. It'will be remembered that I have mentioned the fact that there are auxiliary cams for support for these auxiliary cams, beingV shown as supported for rocking motion in an annular channel 44 extending circumferentially of the blocks 11 and 12, the body of the ring 43 being slotted as at 45 for the passage of the several studs 41. As will be understood there are five of said cams denoted by 46, 47, 48, 49 and 50, and as illustrated they are arranged in annular order on the back or rear side of the oscillatory support or ring 43, by reason of which they are readily accessible. They may be of like or different construction. When they are of different construction which is the usual case, one may impart to its coperating slide a certain throw, while the two adjacent auxiliary cams may transfer different throws to their slides. By reason of this condition I can produce entirely different movements of the respective tool carriers, notwithstanding the fact that the main or master cam is driven at a constant or uniform velocity or speed. The several relatively fixed cams 46 to 50 inclusive are preferably removably mounted, and for this purpose can be held in place by screws 51 tapped into the ring 43, and as shown each consists of two independent segments spaced or separated to present a slot to receive between it the outer end of a coperating stud 41 which is preferably equipped at such end with an anti-friction roller 52. Each cam slot has a tool advancing portion 53 and a tool feeding portion 54, the tool advancing portion being sufliciently eccentric tothe axis of rotation of the cam ring 43 to effect a quick positioning of the tool up to a point where it is about to engage the work, and the tool feeding portion being of less eccentricity or such as will` effect proper cutting feed for the particular tool employed. When th'e ring 43 is in its prima-ry position (Fig. 2) the respective studs 41 or anti-friction rollers 52 thereon, will be in the tool advancing parts 53 ofthe cam slots, by virtue o-f which on the first part of the forward movement of the ring 43 the respective slides 24 will be moved inward to carry their tools substantially into contact with the work, the tools then being given the proper feeding speed by the com.- paratively slightly eccentric portions 54 of said cam slots, the slides being moved outward upon the backwardmovement of the oscillating cam ring 43.

To oscillate the ring 43 any desirable means may be provided, although that now to be described has been found-satisfactory. Fastened to the main shaft 3 is the cam disk 55 constituting a suitable main or master cam. Upon opposite sides of this disk are fastened the duplicate cam members 56, 57 and 57. The cam disk 55 is straddled by the mating levers 58 connected as shown at their lower ends by the integral hub 59 which receives the pivot pin 60 supported by the bracket 61 fastened to the base portion of the bed 2. The levers 58 are connected at their upper end by an integral hub 62 which receives the pivot 63 by which the link 64 is connected to the two levers 58, j the upper end ofthe link being pivoted as at 65 to the ring 43 near the periphery thereof. The levers 58 are equipped onl their inner sides with studs 66 which preferably consist of anti-friction rollers, one stud? 'or anti-friction roller being coperative with the cam members 56, 57 and 57 on one; side of the dis'k 55, while the other stud or; anti-friction roller coperates with the like@ cam members 56., 57 and 57 on the opposite? side of said disk. The respective cam members 57 and 57 abut so as to produce practicallyl the effect of a single cam member. In Fig. 2 the parts are shown as occupying their normal or primary positions, the anti-friction rollers Y 66 being against the inner sides of the cam-members 57. As the cam disk rotates in the direction of the arrow' thereon and when the cam members 56 come in contact with the anti-friction rollers 66, the two levers 58 are drawn downward,`this motion continuing until the rollers 66 leave the cam members 56, the downward movement of the levers being a comparatively slow one. Vhen the cam members 56 pass 0H the two anti-friction rollers 66, said antifriction rollers are met by the companion cam members 57 which with the cani members 57 are adapted to impart a quick return movement to the two levens 58. When the rollers reach the position they are shown as occupying in Fig. 2 and until they are engaged by the cani members 56, the levers 58 will not 'be operated, remaining idle or at rest, and in this particular period the rotary head 14 is indexed.` As the levers 58 are oscillated in the manner described, they through the link 64, impart a corresponding movement to the ring 43 whereby said ring is initially slowlyadvanced and then rapidly retracted. As the ring 48 is thus operated the several cams 46 to 50 inclusive, first move the slides 24 inward, so that the tools thereon will be in position to engage the work, and 'when the studs 41 are in the tool-feeding portions 54 of the cam slots, the slides will be slowlyjfed inward the slides being moved Voutward upon the backward travel of the .cam ring 43.

It will be understood that after each tool has performed its voiice and that when the two levers 58 are in a state of rest as already described, the head is indexed, by reason of which each piece of /work can be brought under the action of each of the tools. Any desirable means may be provided for indexing said head, although that now to be described answers satisfactorily in this respect. An indexing pawl is shown at 70 being pivoted between its ends to the upper end of 65 the lever 71 pivotally supported at its lower .instant before indexing' should take place.

The indexing pawl is held in its advanced position by the spring 79 connected with the lower arm thereof and with the projection 80 on the lever 71. The lever 71 is oscillated by the cam projections 81 and 82 which for such purpose engage studs 83 and; 84 on the adjacent side of the lever 71, the said lever on each advance thereof being carried a distance agreeing to that between two of the notches 73. To disengage the tooth of the indexing pawl 70 from a notch which it may occupy after indexing has been completed, the stud85 may for such purpose engage the lower arm of said pawl, said stud 85 in the present case being carried on the cam drum 4.

What I claim 1s:

1. In a machine of the class described, the

combination of a plurality of carriers, a

main cam, individually adjustable auxiliary1 cams for imparting to said carriers varying movements, and means for transferring the effect of the main cam to the auxiliary cams.

2. In a machine of the class described, the combination of a plurality of carriers, individually adjustablecams for imparting to said carriers varying movements, an oscillatory member on which the cams are mounted, and means for operating said oscillatoryv member at an approximately uniform speed.

3. In a machine of the class described, the combination of a plurality of slides, individually adjustable cams for imparting to said slidesv varying movements, a ring on which said cams are mounted, and means for oscillating said ring.

4. In a machine of the class described, the combination of a plurality of slides,x a main cam, a ring, individually adjustable auxiliary cams supported by said ring, for imparting to said slides varying movements,

and means operative by said main cam for operating said ring.

.5. In a machine of the class described, the combination of a plurality of slides arranged in annular order, a main cam, a support, individually adjustable cams on said support, for imparting to said slides varying movements, and means for transferring the effect o f the main cam to the auxiliary cams.

6. In a machine of the class described, the combination of a plurality of slides arranged in annular order, a main cam, individually adjustable auxiliary cams for imparting to said slides varying movements, a ring on which the auxiliary cams are mounted, and means for transferring the e'ect of the main cam to said ring to operate the latter at an approximately uniform speed. 7. Inamachine ofthe class described, the

combination of a plurality of slides, a mainA cam, auxiliar;7 earnsv for simultaneously imparting varymg movements tothe slides, a

a ring, the projections being located between the rlng and the slides, the ring being carried on said support, the proJections and ring havi o slots, and the slides having studs exteing through `the slots,y cams on the outside of the ring, engaging said studs for independently operating the slidesand means for operating the rilihg.

' In testimony whereof I a x my signature in presence of two witnesses.

GEORGE B. PICKOP. 

